CheckCleanerBound.java

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/*
 * @test
 * @bug 8284910
 * @summary Check that the cleaner is not bound to the PasswordCallback object
 * @library /test/lib/
 * @build jdk.test.lib.util.ForceGC
 * @run main/othervm CheckCleanerBound
 */

import javax.security.auth.callback.PasswordCallback;
import java.lang.ref.WeakReference;
import jdk.test.lib.util.ForceGC;

public final class CheckCleanerBound {

    public static void main(String[] args) throws Exception {
        // Create an object
        PasswordCallback passwordCallback =
                new PasswordCallback("Password: ", false);
        passwordCallback.setPassword("ThisIsAPassword".toCharArray());

        WeakReference<PasswordCallback> weakRef =
                new WeakReference<>(passwordCallback);
        passwordCallback = null;

        // Check if the object has been collected.  The collection will not
        // happen if the cleaner implementation in PasswordCallback is bound
        // to the PasswordCallback object.
        ForceGC gc = new ForceGC();
        if (!gc.await(() -> weakRef.get() == null)) {
            throw new RuntimeException(
                "PasswordCallback object is not released");
        }
    }
}